Origin of turnsole
Examples from the Web for turnsole
The lower part from a was filled with water tinged blue, or rather purple, with the juice of turnsole, or archil.Experiments and Observations on Different Kinds of Air|Joseph Priestley
A violet tint is given by the tinctures of turnsole and cochineal.
He styles the colouring substance itself cutbear, persio, or turnsole; and distributes the lichens as follows:—1st.